yesterday i've ugpraded to last beta update ( i cant remember the exactly version 16.6.xx i belive) after pc reboot hd audio on hmdi can't work. In windows audio panel my monitor is set as defaut device. Clickig it with left mouse button then clicking "Test" (or "try" - i've a localize windows version) move the green line up and down but no sound can be heard. I've tried to uninstall amd beta driver then reinstall last stable, without resolving the issues. No strange event in eventvwr, no stange yellow mark in devide manager. I 've try varius thing, for example disable all output device leaving only hdmi monitor, checking the volume level, uninstalling and reinstalling varius crimson version. No way...